Mortar composition.



UNITED STATES PATENT OFFICE.

EDWIN K. WELCI-I, OF PHILADELPHIA, PENNSYLVANIA.

MORTAR COMPOSITION.

SPECIFICATION formingpart of Letters Patent No. 706,138, dated August 5,1902. Application filed December 20, 1901. Serial No. 86,721. (Nospecimens.)

To all whom it may concern.-

Be it known that I, EDWIN K. WELGH, a citizen of the United States,residing at the city of Philadelphia, in the county of Philadelphia andState of Pennsylvania, have invented certain new and useful Improvementsin Mortar Composition, of which the followingis a specification.

My invention has relation to a prepared plaster material, as a mortar,for'buildi'ng and similar operations.

The principal object of my present invention is to provide acomparatively inexpensive and reliable prepared plaster material foremployment as a mortar for building and other operations.

My invention, stated in general terms, consists of a mortar compositionprepared in substantially the manner hereinafter described and claimed.

The plastering material for being used as a mortar of my invention forbuilding and other somewhat similar operations is preferably prepared asspecified hereunder and composed of the matter and substances ormaterials as follows: jute or the like as a binder for the matter ormaterials and in about the proportion of ten per cent. by weight, groundor crushed unslaked lime as the slakening agent and in about theproportion of twentyfive per cent. by weight, ground or crushed cinderfrom anthracite or bituminous coal burned in steam-boilers or hot-waterfurnaces as a filler and strengthening ingredient and in about theproportion of sixty per cent. by weight, and litharge as a drying andhardening agent and in about the proportion of five per cent. by weight.Water may be added to the mechanically-combined mixture of the saidmatter and materials when required for use as a mortar composition ineither a dry or wet condition, according to the intended particular useto be made thereof.

In the preparation of the said mechanically-combined mortar mixture orcomposition the cinder by reason of its grit acts as a filler and is asubstitute for sand; but it has this advantage over sand of furnishing acertain percentage of quicklime and of oxid of iron, as well as makingthe mixture more enduring and strengthening the same, as well ascheapening production due to the less quantity of lime required in themaking of the mortar composition. The lithar'ge added to the mass in asubstantially dry state to the other ingredients of themechanically-mixed composition not only greatly hastens drying, but alsohardening of the mass or mixture in its combined condition when applied.The plas tering composition when prepared as herein= before explainedmay have the water added thereto either at the place of manufacture orplace of use, as preferred.

Having thus described the nature and ob ject of my invention, what Iclaim as new, and desire to secure by Letters Patent, is

1. A composition of matter adapted with the addition of water to form amortar or plasterin g material, the said composition consisting ofground or crushed unslaked lime, ground or crushed cinder, jute andlitharge, all mechanically combined in a substantially dry state.

2. A composition of matter adapted with the addition of water to form amortar or plastering mixture or composition, consisting of twenty-fiveper cent. of ground or crushed unslaked lime, sixty per cent. of groundor crushed cinder, ten per cent. of jute and five per cent. of litharge,all mechanically combined in a substantially dry state.

In witness whereof I have hereunto set my signature in the presence oftwo subscribing witnesses.

EDWIN K. WELOI-I.

W'itnesses:

J. WALTER DOUGLASS, THOMAS M. SMITH.

